:root { color-scheme: light; --ink: #1c2433; --muted: #5c677a; --line: #d6dce5; --surface: #fff; --canvas: #e8ecf2; --brand: #0b5cad; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; color: var(--ink); background: var(--canvas); font: 13px/1.4 Arial, Helvetica, sans-serif; }
h1 { font-size: 16px; margin: 0; }
h2 { font-size: 14px; margin: 22px 0 10px; }
button, .button, input, select, textarea { font: inherit; color: inherit; }
button, .button { padding: 6px 11px; border: 1px solid var(--line); border-radius: 5px; background: var(--surface); cursor: pointer; }
button:hover:not(:disabled), .button:hover { border-color: #93a0b2; }
button:disabled { opacity: .4; cursor: default; }
.primary { background: var(--brand) !important; border-color: var(--brand) !important; color: #fff; }
input:not([type=color]):not([type=range]):not([type=file]), select, textarea { width: 100%; padding: 6px 7px; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
textarea { resize: vertical; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 1px; }
.hint { color: var(--muted); }
.spacer { flex: 1; }

.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login form { display: grid; gap: 12px; width: min(340px, 100%); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 24px; }
.login p { margin: 0; color: var(--muted); }
.login label { display: grid; gap: 4px; }
.login .error { color: #a4161a; min-height: 1em; }

.topbar { display: flex; align-items: center; gap: 10px; padding: 9px 14px; background: var(--surface); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.topbar .title { width: min(360px, 40vw) !important; font-weight: 700; border-color: transparent !important; }
.topbar .title:hover, .topbar .title:focus { border-color: var(--line) !important; }
.menu { position: relative; }
.menu summary { list-style: none; }
.menu summary::-webkit-details-marker { display: none; }
.menu-items { position: absolute; right: 0; top: calc(100% + 4px); z-index: 20; display: grid; min-width: 250px; padding: 4px; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; box-shadow: 0 6px 20px rgba(0, 0, 0, .14); }
.menu-items button { border: 0; text-align: left; }
.menu-items button:hover { background: #eef2f8; }

.library { max-width: 980px; margin: 0 auto; padding: 8px 16px 48px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.tile { display: grid; gap: 3px; padding: 14px; text-align: left; }
.tile span { color: var(--muted); }
.docs { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.docs li { display: flex; gap: 6px; }
.doc-open { flex: 1; display: grid; gap: 2px; text-align: left; }
.doc-open span { color: var(--muted); }

.conflict, .overflow { padding: 8px 14px; background: #fff3cd; border-bottom: 1px solid #e6cf85; }
.overflow { background: #fde2e1; border-color: #efb3b0; color: #7c1d1a; font-weight: 700; }
.workspace { display: grid; grid-template-columns: 350px minmax(0, 1fr); height: calc(100vh - 53px); }
.sidebar { overflow-y: auto; padding: 10px; background: #f6f8fb; border-right: 1px solid var(--line); }
.stage { overflow: auto; padding: 16px; }
.pages { width: max-content; margin: 0 auto; display: grid; gap: 18px; }
.pages .page { box-shadow: 0 3px 16px rgba(20, 30, 50, .22); break-after: auto; }
.pages .block { cursor: pointer; }
.pages .block:hover { outline: 1.5px dashed rgba(11, 92, 173, .6); outline-offset: 2px; }

.side-tabs { display: flex; gap: 4px; margin-bottom: 8px; }
.side-tabs button { flex: 1; }
.side-tabs .active, .panel-picker .active { background: var(--brand); border-color: var(--brand); color: #fff; }
.panel-picker { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; margin-bottom: 8px; }
.panel-picker button { padding: 4px 5px; font-size: 11px; }
.section-card { margin-bottom: 6px; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; }
.section-card.open { border-color: var(--brand); }
.section-head { display: flex; align-items: center; justify-content: space-between; padding: 8px 9px; font-weight: 700; cursor: pointer; }
.actions { display: inline-flex; gap: 2px; }
.mini { padding: 0 6px; height: 22px; border: 0; background: none; color: var(--muted); font-weight: 400; }
.mini:hover:not(:disabled) { color: var(--ink); background: #eef2f8; }
.section-body { display: grid; gap: 9px; padding: 3px 9px 11px; }
.field { display: grid; gap: 3px; }
.field.inline { grid-template-columns: 1fr auto; align-items: center; }
.field input[type=range] { width: 100%; }
.label { color: var(--muted); font-size: 12px; font-weight: 700; }
.icon-row, .image-row { display: flex; align-items: center; gap: 7px; }
.glyph { display: block; flex: none; width: 24px; height: 24px; color: var(--brand); }
.thumb { flex: none; width: 44px; height: 32px; display: grid; place-items: center; background: #eef2f8; border-radius: 3px; overflow: hidden; }
.thumb img { max-width: 100%; max-height: 100%; }
.list-editor { display: grid; gap: 4px; }
.list-item { border: 1px solid var(--line); border-radius: 5px; padding: 0 7px; }
.list-item[open] { padding-bottom: 8px; display: grid; gap: 7px; }
.list-item summary { display: flex; align-items: center; justify-content: space-between; gap: 6px; padding: 5px 0; cursor: pointer; }
.item-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.add { justify-self: start; padding: 3px 8px; }
.sidebar > div > select { margin-top: 4px; }

.history { width: min(560px, 92vw); border: 1px solid var(--line); border-radius: 8px; }
.history h2 { margin-top: 0; }
.history ul { list-style: none; margin: 0 0 12px; padding: 0; display: grid; gap: 6px; max-height: 60vh; overflow: auto; }
.history li { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.toast { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); padding: 8px 14px; background: #1c2433; color: #fff; border-radius: 5px; z-index: 40; }

@media (max-width: 820px) {
  .workspace { grid-template-columns: minmax(0, 1fr); height: auto; }
  .stage { order: -1; }
  .sidebar { border-right: 0; border-top: 1px solid var(--line); }
}